Gran Canaria has no poisonous land animals except for a couple of spiders and a nocturnal centipede that nobody ever sees. There are no scorpions, poisonous snakes, or insect-borne diseases.
In fact, Gran Canaria is one of the safest places you can visit for a holiday.
We do have cockroaches in the resorts, towns and villages. They are harmless, and all hotels and apartment complexes are required to fumigate regularly so you won't see many of them.
Click here for more info on the few dangers and annoyances in Gran Canaria.